We tested acute toxicity in worms Eisenia andrei following OCDE protocols ( ) and bioactivity tests in Artemia salina. The alkaloids fraction. Bioensayo de toxicidad en artemia salina. Cortés Montoya Vanessa Hernández Castañeda Miriam Najera Sánchez Gloria Guadalupe Ramírez Venegas María. Bioensayo de La Toxicidad Del Nitrato de Potasio en Reproductores de Artemia Salina en Condiciones de Laboratorio – Download as Word Doc .doc), PDF.

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These results contrast with those of Atemia et al. Differences were considered as significant sailna p was lower than 0. References Publications referenced by this paper. Since the dawn of medicine, man has used natural products for the treatment of disease. A marine diatom-derived aldehyde induces apoptosis in copepod and sea urchin embryos. Bioactive compounds with a novel fused ring system from Crescentia cujete.

The cytotoxicity of tested DESs was much higher than that of their individual components, indicating their toxicological behavior was different. Prymnesium parvum has not been reported specifically in the WFD reports. L y Psidium Guineense. Therefore, the minimum toxic concentration values established in the present study for the model organisms cannot be considered as a real toxic value. Maximal and also optimal temperature and pH were determined to be 40oC and pH 7.

The bioassay was based on the exposure of the newly-fertilized eggs to different concentrations of cultured and filtered microalgae for 48 hours Table 1.


After that time, all larvae had moulted to instar II-III stages and the hatched nauplii were separated from remaining cysts using a Pasteur pipette. Considering the filtrate of P. In addition, the minimum concentration with significant mortality was cell mL —1 at 24 and 48 hours of exposure.

Dichloromethane and methanol extracts of leaves and branches collected three times were subjected to phytochemical screening by comparative thin layer chromatography and NMR analyses.

A partir de g del epicarpio de C.

Química y biología del extracto etanólico del epicarpio de Crescentia cujete L. (totumo)

Nova Science Publishers Inc. Several metal ions were added to the amylase reaction to determine if they inhibited or enhanced the brine shrimp amylase activitiy.

In addition, the involvement of the genus Prymnesium in fish mortalities makes its toxicity evaluation important in order to ensure the good quality of areas with fish aquaculture and shellfish exploitation.

Comparison of methods to obtain a liquid phase in marine sediment toxicity bioassays with Paracentrotus lividus sea urchin embryos. Specimens were transported alive in a container with seawater and processed immediately in the laboratory. Artemiidae larvae and apical cells of Allium cepa L.

Artemia salina

Among the genera responsible for harmful algal blooms HABsthe genus Alexandrium is one of the most important, in terms of severity, diversity and distribution of bloom impacts Anderson et al.

Editorial Universidad del Valle; Bignonaceae tree known in Colombia as totumois a characteristic species of tropical climates.


The biological study revealed that the extract did not show acute toxicity either in any of the tested biological systems or at the concentrations and the time of bioenasyo.

Thermal and pH stabilities ranged from 0oC to about 50oC and pH 6. Effects of toxic Alexandrium species on the survival and feeding rates of brine shrimp, Artemia salina.

There were found evidences of terpenes, phenolic substances phenols and flavonoids and alkaloids, with differences between the vegetal part, collection period and solvent used. Short-term and long-term effects of the toxic dinoflagellate Alexandrium minutum on the copepod Acartia clausi.

Tests of animal exposure to different concentrations of the toxicant were performed ds 24, 48 and 72 hours after larvae hatching. They are also non-selective filter bioenssayo sensitive to toxic substances Sarabia Sarabia R.

Skip to main content. However, a dose-dependent toxic effect of several marine microalgae on sea urchin cell division has been recorded in several studies Paul and Fenical Paul V. Only larvae of Paracentrotus lividus and Artemia franciscana have been demonstrated to be sensitive to the toxicity of the two marine microalgae Toxlcidad minutum and Prymnesium parvum.